// 定义接口
export interface FoodStyle {
  left: string,
  top: string
}
export interface SnakeStyle {
  left: number,
  top: number
}
export interface FractionStyle {
  fraction: number,
  Grade: number
}
export interface Snakebody extends SnakeStyle {
  index: number,
  str: string,
  class: string
}
export interface Help {
  src: string,
  IsShow: boolean,
  height: number,
  Height: number,
  Difficulty: number
}